King of Hawkers centres around Zhang Nala (Dawn), who returns to Singapore from Hong Kong to restart her life at her family-run bak chor mee stall after divorcing her rich playboy husband (Collin Chee). Operating next to Nala's stall are others selling local cuisines, such as Ah Lau's Cantonese Cuisine, run by Liu Derong (Hugo) and Bestest Indian Food, which is operated by Raja (Das DD). When a multinational company organises a competition in an attempt to buy over Nala and other hawkers' recipes and businesses, they work together to retain their legacy.

Soh Hock, a good for nothing brother-in-law tries to steal an age old Chinese pastry recipe from his own brother-in-law in a bid to sell it and get rich quickly. Things quickly take a turn when a God of Fortune sees his plan and decides to turn his life upside down.

Dongnan, a 58-year-old restaurant employee, has long been known for his slacking off and unreliability, which led to his demotion to a security guard. Struggling with stagnant career prospects and family tensions, he dreams of becoming his own boss. With his friend Douyin Jie's help, Dongnan opens a restaurant and experiences initial success. Seeking to improve his home life, he purchases an AI robot that helps manage household chores and mediates family conflicts. However, his apprentice Steven betrays him by stealing secret recipes and using AI technology against him. Through a challenging journey of intense competition and personal crisis, Dongnan undergoes a transformative experience that forces him to confront his past behaviors and relationships.